Miwa-san Narisumasu

Miwa Kubota is a 29-year old movie fanatic who just got fired from her dead-end job. She saw that her favorite actor, the world-renowned Takahashi Yakai, is looking for a housekeeper. Even though she is totally unqualified, she goes there anyway. When she saw the new hire get into an accident outside his door, Miwa steps in to become the "pretend" housekeeper for her idol.
(Source: MangaUpdates)
~~ Adapted from the manga series "Miwa-san Narisumasu" (ミワさんなりすます) by Aoki U-hei (青木U平).